BATC Forum

Hello All
I am seeking help, I am trying to get my PD4 to work with my C525 and C170 web cams.
According to the wiki they are supported.

My set up is PD4 with original 7 inch screen and pluto running 202111200 software.

When I select the test-card by its self it works fine and great TX pictures.

When I select the PI camera it works fine.

But when I depower and unplug the PI Cam and I plug in ether the C170 or C525 separately there is no RF output when I transmit
and the LED on the web cam does not light up.

When plugged in separately I can see the web cams when I push the C920 monitor button .

I have tried different symbol rates but no RF out.

Using putty both the web cams identify ok, attached is the C170 printout and the INFO screen.

What am I doing wrong or are there other settings I need to make somewhere ?

Any help would be greatly appreciated Thanks.
73
Bruce VK3MN

Try just webcam rather than C920?

Hi Bruce

Your problem is that the Porstdown with Pluto is only tested at Symbol Rates up to 1 MS (as stated here https://wiki.batc.org.uk/Portsdown_4_Pluto).

The Test Card might work at higher SRs, but Webcams certainly do not. Try it at a reasonable symbol rate like 500 kS. You should get RF and pictures.

If you need 4 MS, you must use a LimeSDR Mini (not LimeSDR USB) with the DVB firmware. It's only a Raspberry Pi!

Dave

Sorry, I didn't spot that Bruce was trying to put 4ms through a Pluto!

Hello all, thanks for replys, much appreciated.
Its been +30'c in the shack this week and too hot to do much, thats Melbourne weather for you.
After much experimenting with the c170 and c525 I seem to have found a solution to my problem of no rf out from the Pluto

All my previous testing has been with the Audio turned OFF.

I have found if I turn the Audio ON from webcam, I now get rf out and good pictures up to 4K,
if I turn the audio off again, no rf.
Cheers
Bruce VK3MN